ITCP Iowa Test of Consonant Perception

Speech perception, especially in background noise, is a critical problem for hearing impaired listeners, and an important issue for cognitive hearing science. Despite a plethora of standardized measures, there are few single-word, closed-set tasks that uniformly sample the phonetic space and which use response choices that balance all phonetic features. The Iowa Test of Consonant Perception (ITCP) was developed to solve this. It is a phonemically balanced word recognition task designed to assess perception of the initial consonant of monosyllabic consonant-vowel-consonant (CVC) words. The ITCP consists of 120 phonetically balanced CVC words. Words were recorded from four different talkers (two female), and uniformly sample from all four corners of the vowel space to control for coarticulation. Response choices on each trial are balanced to equate difficulty and sample a single phonetic feature. This study evaluated the psychometric properties of ITCP by examining reliability (test-retest) and validity in a sample of online normal hearing participants. Ninety-eight participants completed two sessions of the ITCP along with standardized tests of words and sentence in noise (CNC words and AzBio sentences). The ITCP showed good test-retest reliability and convergent validity with two popular speech-in-noise tasks. ITCP materials are freely available here: https://osf.io/hycdu/.

语音感知，尤其在背景噪音中的语音感知，对于听力受损的听者而言是一项至关重要的挑战，同时也是认知听觉科学领域中的一个重要课题。尽管存在众多标准化的评估方法，但关于统一采样语音空间并采用平衡所有语音特征的响应选项的单词闭合集任务却寥寥无几。为了解决这一问题，爱荷华州立大学开发的辅音感知测试（Iowa Test of Consonant Perception，简称ITCP）应运而生。该测试是一项语音平衡的音素识别任务，旨在评估单音节辅音-元音-辅音（CVC）词语中初始辅音的感知能力。ITCP由120个语音平衡的CVC词语组成。这些词语由四位不同的说话者（其中两位为女性）录制，并从元音空间的四个角落进行统一采样，以控制语音的共发音。每个试验的响应选项均保持平衡，以均衡难度并采样单个语音特征。本研究通过考察在线正常听力参与者的信度和效度，评估了ITCP的心理测量属性。共有98名参与者完成了两轮ITCP测试，以及标准化的噪音中单词和句子测试（CNC词语和AzBio句子）。ITCP表现出良好的重测信度和与两种流行噪音中语音任务的一致效度。ITCP材料可免费获取于：https://osf.io/hycdu/。